I might as well point out how nice the design looks. I believe we ought to share a round of applause for Calvius, even if he's not so often here to appreciate it.
As of now, Tomas points at the pokemon already created by the Se7en team, including Bug/Dark, Bug/Normal and Bug/Psychic, courtesy of Hukuna.
We're being led towards Bug/Psychic with domestication being the primary factor. I know what mayhem Andetle's evo can create, so I have a pretty solid idea of what the HA is.
These annoucements however can be misleading, as Bug/Dragon and Bug/Ice are fan-favorite types. Yet I dispute them, simply due to Hexatis's backstory. An Ice type is perfect for ruining crops, but the LC form is a mere Bug. Personally speaking, if I were a farmer, I would not produce an Ice type under any circumstances. Similarly I would not be able to create a Dragon or even tame one. So Dragon would be the least possible evolution, even if Tomas didn't hint against it in the first place.
Edit: We already have a mantis in Scyther, so I'm expecting a very good special attacker from this.